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Carbon and its Compounds — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceCarbon and its Compounds1 Mark
MCQ
The following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as.
Assertion Alcohol cannot be used as an additive in petrol.
Reason Alcohol give rise to $CO$ and $H_2O$ when burnt in sufficient air.
  • A
    If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
     
  • B
    If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
     
  • C
    If Assertion is true, but Reason is false.
     
  • ✓
    If Assertion is false, but Reason is true.
✓

Answer

Correct option: D.
If Assertion is false, but Reason is true.
In the absence of subsidy, there would be very little use of ethanol as a fuel. But those are no the only reasons. Ethanol carries less energy than the same volume of gasoline. Ethanol is also much more hygroscopic than gasoline, absorbing significant amounts of water from air.

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